Pencil sharpener



I Feb. 14, 1939. Av R. FREDERICK PENCIL SHARPENER Filed June 7, "193*? k r 4 w 4 M 1 m M 5 z a R. r F fl w I M fi V F fl l w 5 \l I W V 1 e a n m m m m m. M u a m .I+. 3 M.

ATTORNEYS Patented Feb. 14, 1939 2,146,896

; UNITED STATES PATENT oFFicE PENCIL SHARPENER Arthur R. Frederick, Brooklyn, N. Y. Application June 7, 1937, Serial No. 146,921 4 Claims. (01. 120-436) This invention relates to improvements in penally designated at 22 and 23 are fixedwithin the oil sharpeners and more particularly to imcollars I8 and I9 and the length of the bristles provements in pencil sharpeners of the type is adjusted so as to form an annular brushing which comprise rotatable cutting members opermember whose outer radius is substantially equal ated by an inward toothed gear. to the distance between the center point of the 5 It is an object of the present invention to prospindle as shown in section in Fig. 3 and the vide means whereby particles of wood and penaxis of rotation of the shaft 4. In this manner cil lead will be removed from the pencil after it will be evident that the entire pencil a d p sharpening, thereby minimizing soiling of the Will be brushed upon removal rom t S p- 10 h n of t user, ener. The head member 24 is positioned as 10 Another object of the present invention is to Shown n 1 up t Sp d s 9 and n, thereprovide means whereby this eifect may be obby maintaining the members l3 and I4 and their tained in one operation without necessitating p rating m m r in p ra p s ti n n separate sharpening and cleaning of the pencil. eir spindles. This member also serves as a Another feature of the present invention is guiding means for the pencil and insures that 15 that the cleaning means can be interchanged or the pencil will be maintained in a position relaentirely removed if desired without interfering /61y Coa a 0 t driving a t with the operation of the sharpener. n the preferred embodiment of the present The invention will be fully and comprehensiveinvention the heads 8 and 24 are integrally ly understood from a consideration of the followunited, preferably being formed in one piece as 20 ing detailed description when read in connection shown in Fig. 3. The surfaces 25 of this member with the accompanying drawing which form part serve to assist in guiding the pencil into the deof th application, sired position between the cutting edges of the I th drawing: helical cutters hereinbefore described. In prac- 25 Fig. 1 represents a vertical section of the appaice they fit d wn sn ly between these cutters 2 t and also serve the additional function of assist- Fig. 2 represents a side view of the guard cas- .ing in removal of cuttings from the cutting suring used in conjunction with the device accordface. The shoulders 26 also serve to spring the ing to the present invention, and bristles of the brushes as they are rotated, there- :30 Fig. 3 represents a vertical section along the by facilitating cleaning of same. 30 line 3-3 of Fig. 1 with parts removed for clear- When it is desirable to remove the brushes, as e for example for replacement, the outer casing In the drawing, 4 is a shaft rotatable within is removed and the threaded spindles 9 and II] the casing member 5, having attached thereto are unscrewed from their seat in the head 8,

the outer casing member 6 and the fixed interpulled out, and the helical cutting members with 35 nally toothed gear member 1. 8 is a head memtheir cooperating parts removed. The collars ber fixedly attached to the shaft 4 and carrying carrying the brushes can be removed from the the spindles 9 and i0 engaged therein by the cutting members by loosening the set screws as threads generally designated at I! and I2. The hereinabove mentioned.

members 13 and I4 are rotatable about the spin- It is to be understood that this improvement 40 dles 9 and I9 and carry helically ground cutis capable of extended application and is not ting surfaces designed to engage with pencil l5 confined to the exact showing of the drawing nor and sharpen same in the usual way. A portion to the precise construction described and, thereof the members 13 and M is cut to form spur fore, such changes and modifications may be gears 16 and I? which engage with the internalmade therein as do not affect the spirit of the 45 ly toothed gear member i fixedly positioned in invention nor exceed the scope thereof as exthe casing so that when the shaft 4 is rotated pressed in the appended claims. the members l3 and M will rotate about their What is claimed as new is: spindles 9 and Ill. The sleeve members l8 and 1. In a device for sharpening pencils, compris- I9 are pos t ed upon an extension collar of the ing a rotatable shaft carrying a head bearing 50 members I3 and Hi and fixed in position upon spindles upon which are mounted helically same by the set screws 20 and 2! so that these ground rotatable cutters, the improvement which collars rotate in conjunction with the cutting comprises brush members aflixed to said cutters members but can be removed from same by and rotatable in conjunction therewith.

loosening of the set screws. The brushes gener- 2. In a device for sharpening pencils, comprls- 55 ing a rotatable shaft carrying a head bearing spindles upon which are mounted. helically ground rotatable cutters, the improvement which comprises brush members afiixed to said cutters and rotatable in conjunction therewith, whereby the pencil is brushed as it is removed from contact with the cutting members.

3. In a device for sharpening pencils, comprisinga rotatable shaft carrying a head bearing spindles upon which are mounted helically ground rotatable cutters, the improvement which comprises brushing means associated with and rotatable in' conjunction with said cutters and said head, adapted to remove cuttings from objects placed in contact with said cutters.

4. In a device for sharpening pencils, comprising a rotatable shaft carrying a head bearing spindles upon which are mounted helically ground rotatable cutters, the improvement which comprises brush elements mounted on parts of and rotatable in conjunction with said cutters and said head, adapted to remove cuttings from 10 objects placed in contact with said cutters.

ARTHUR R. FREDERICK. 

